Exclusionary (adjective)

1. Relating to the action of excluding someone or something.
2. Tending to exclude or tending to be used to exclude people or things.

Origin:

Mid 17th century: from exclusion, on the pattern of words such as revolutionary.

Examples:

1. The exclusionary rule prohibits the admission of illegally obtained evidence in a court of law.
2. The school's policies are increasingly exclusionary, making it difficult for low-income students to attend.
3. The exclusionary zoning laws effectively kept people of color out of certain neighborhoods.
4. The country's exclusionary immigration policies have resulted in widespread poverty and human rights abuses.
5. This exclusionary attitude toward people with disabilities is unacceptable and must be challenged.